20258875

素因数分解:

$5^3\times 7^1\times {\mathrm{13}}^2\times {\mathrm{137}}^1$

素因数の和:185

約数の個数: 48

約数和(自身を含む): 31516992

約数和(自身を除く): 11258117

約数列:

[1, 5, 7, 13, 25, 35, 65, 91, 125, 137, 169, 175, 325, 455, 685, 845, 875, 959, 1183, 1625, 1781, 2275, 3425, 4225, 4795, 5915, 8905, 11375, 12467, 17125, 21125, 23153, 23975, 29575, 44525, 62335, 115765, 119875, 147875, 162071, 222625, 311675, 578825, 810355, 1558375, 2894125, 4051775, 20258875]

約数ペア:

[(1, 20258875), (5, 4051775), (7, 2894125), (13, 1558375), (25, 810355), (35, 578825), (65, 311675), (91, 222625), (125, 162071), (137, 147875), (169, 119875), (175, 115765), (325, 62335), (455, 44525), (685, 29575), (845, 23975), (875, 23153), (959, 21125), (1183, 17125), (1625, 12467), (1781, 11375), (2275, 8905), (3425, 5915), (4225, 4795)]